Alternative Names

Causes

Every woman's menstrual cycle, or period, is different. On average, a woman's period occurs every 28 days. Most women have cycles between 24 and 34 days apart. It usually lasts 4 - 7 days.

Young girls may get their periods anywhere from 21 to 45 days or more apart. Women in their 40s will often notice their period occurring less often.

About every month, the levels of female hormones in a woman's body rise and fall. Estrogen and progesterone are two very important hormones. These hormones play an important role in ovulation, the time when the ovaries release an egg.

Dysfunctional uterine bleeding (DUB) most commonly occurs when the ovaries do not release an egg. Changes in hormone levels cause your period to be later or earlier and sometimes heavier than normal.

Symptoms

Symptoms of dysfunctional uterine bleeding may include:

Bleeding or spotting from the vagina between periods

Periods that occur less than 28 days apart (more common) or more than 35 days apart

Time between periods changes each month

Heavier bleeding (such as passing large clots, needing to change protection during the night, soaking through a sanitary pad or tampon every hour for 2 - 3 hours in a row)